CISSP: Physical (Environmental) Security Flashcards
- Electrical fires are classified as what type of fire and use what extinguishing methods?
A. Class B; CO2 or soda acid
B. Class B; CO2 or FM-200
C. Class C; CO2 or FM-200
D. Class A; water or soda acid
C. Class C; CO2 or FM-200
Class B fires consist of burnable fuels and are extinguished by using CO2, soda acid, or FM-200. Class A fires consist of common combustible materials. Review “Physical Security Threats.”
- The three elements of the fire triangle necessary for a fire to burn include all the following except
A. Fuel
B. Oxygen
C. Heat
D. Nitrogen
D. Nitrogen
The fire triangle consists of fuel, oxygen, and heat. Review “Physical Security Threats.”
- A prolonged drop in voltage describes what electrical anomaly?
A. Brownout
B. Blackout
C. Sag
D. Fault
A. Brownout
A blackout is a total loss of power, a sag is a short drop in voltage, and a fault is a momentary loss of power. Review “Physical Security Threats.”
- What type of cabling should be used below raised floors and above drop ceilings?
A. CAT-5
B. Plenum
C. PVC
D. Water-resistant
B. Plenum
Cat 5 cabling can be either plenum or PVC-coated. PVC cabling releases toxic vapors when burned. Both PVC and plenum coatings are water resistant. Review “Designing a secure facility.”
- In order to deter casual trespassers, fencing should be a minimum height of
A. 1 to 3 feet
B. 3 to 4 feet
C. 6 to 7 feet
D. 8 feet or higher
B. 3 to 4 feet
Fencing of 1 to 3 feet might deter a toddler or a duck! 6 to 7 feet is too high to climb easily. Eight-foot-tall or higher fencing (that includes three-strand barbed wire at the top) can deter a more determined intruder. Review “Fencing.”
- Three types of intrusion detection systems (IDSs) used for physical security include photoelectric sensors, dry contact switches, and which of the following?
A. Motion detectors
B. Anomaly-based
C. Host-based
D. Network-based
A. Motion detectors. Anomaly-based, host-based, and network-based systems are types of intrusion detection systems (IDSs) used for computer systems and networks. Review “Intrusion detection.”
- A water sprinkler system in which no water is initially present in the pipes and which, at activation, delivers a large volume of water describes what type of system?
A. Wet-pipe
B. Dry-pipe
C. Deluge
D. Preaction
C. Deluge
A wet-pipe system always has water present in the pipes. A dry-pipe system is similar to a deluge system but doesn’t deliver a large volume of water. A preaction system combines elements of both wet- and dry-pipe systems. Review “Suppression systems.”
- Portable CO2 fire extinguishers are classified as what type of extinguishing system?
A. Gas-discharge systems
B. Water sprinkler systems
C. Deluge systems
D. Preaction systems
A. Gas-discharge systems
Water sprinkler systems are fixed systems that discharge water. Deluge and preaction systems are types of water sprinkler systems. Review “Suppression systems.”
- Which of the following extinguishing agents fights fires by separating the elements of the fire triangle, rather than by simply removing one element?
A. Water
B. Soda acid
C. CO2
D. FM-200
D. FM-200
Water fights fires by removing the heat element. Soda acid fights fires by suppressing the fuel element. CO2 fights fires by removing the oxygen element. Review “Suppression systems.”
- Production of Halon has been banned for what reason?
A. It is toxic at temperatures above 900°F.
B. It is an ozone-depleting substance.
C. It is ineffective.
D. It is harmful if inhaled.
B. It is an ozone-depleting substance
Halon does release toxic chemicals at temperatures above 900°F and is harmful if inhaled in concentrations greater than 10 percent, but its production wasn’t banned for these reasons. Review “Suppression systems.”
What are the five categories that a physical security program should detail when considering the threats and countermeasures that apply?
a. Deter, detect, react, sustain, and maintain
b. Deter, delay, respond, sustain, and maintain
c. Deter, delay, detect, assess, respond
d. Deter, delay, assess, respond, and confirm
C. When developing a physical security program, countermeasures should be implemented to:
Deter: Convince the attacker not to attack.
Delay: Slow down the penetration of the intruder. Enhances deter and detect.
Detect: Identify the intrusion as soon as possible.
Assess: Identify the severity of the threat, the potential for harm to personnel, and the scale of the potential losses.
Repond: Policies and procedures should dictate how to respond to the various threats, based on the assessment.
What is a Faraday cage?
a. An enclosure that provides a complex access control implementation, including mantraps
b. An enclosure that prevents all emanations from exiting or entering the area enclosed by the cage
c. A wired room enclosed by a cage that does not allow entry to any unauthorized individuals and has only one way in
d. The copper shielding around twisted-pair wiring that provides additional emanations protection and strength
B. A Faraday cage is an area, mobile room, or entire building that is designed with an external conductive sheathing that reduces or prevents emanations from exiting or entering the area.
What are the two types of uninterruptible power supplies?
a. Internal and external
b. Online and offline
c. Internal and offline
d. Online and standby
D. During normal use, the standby UPS connects supported systems (the load) to the primary AC power through surge suppression filters. Parallel to that, it charges a bank of batteries. When the AC power fails, the UPS detects the failure and switches to providing power from the batteries.
What are the four legs of a fire?
a. Fuel, oxygen, contaminants, and chemicals
b. Fuel, chemical reaction, water, temperature
c. Oxygen, fuel, Halon, and temperature
d. Fuel, oxygen, temperature, and chemical recation
D. Combustion requires fuel, oxygen, temperature and a chemical reaction if it is to ignite and continue to burn.
What are the five classes of a fire?
a. A, B, C, D, K
b. A, B, C, D, E
c. A, B, C, D, F
d. L, M, N, O
A. The five classes of fires are based on the initiator and what fuels the fire. The five classes are A, common combustibles such as wood, paper and laminates; class B, liquids, such as petroleum products and flammable gas; class C, electrical, which includes electrical equipment and wires; class D, combustible metals such as magnesium, sodium, and potassium; class K, kitchen fires, including grease and oils.